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Grok's New Voice APIs: Speech Recognition and Synthesis at Enterprise Scale

TL;DR xAI launched standalone Speech-to-Text (STT) and Text-to-Speech (TTS) APIs built on the same stack powering Grok Voice, Tesla in-vehicle assistants, and Starlink customer support Grok’s STT is among the cheapest at $0.10/hour (batch) and $0.20/hour (streaming), with features like speaker diarization, word-level timestamps, and Inverse Text Normalization The TTS offering ships with five expressive voices, inline expression control tags ([laugh], [sigh], whisper), and covers 20 languages - priced at $4.20 per million characters xAI’s pitch is vendor consolidation: replacing three separate contracts (transcription, LLM, synthesis) with one stack on one billing account The best fit is teams already building on Grok for reasoning - for lowest-latency TTS, ElevenLabs Flash v2.5 at ~75ms is still unmatched xAI has released two standalone voice APIs - Speech-to-Text (STT) and Text-to-Speech (TTS) - built on the same stack powering Grok Voice, Tesla in-vehicle assistants, and Starlink customer support. The move puts xAI in direct competition with ElevenLabs, Deepgram, and AssemblyAI, three companies that have owned the enterprise voice API market for years. ...

April 24, 2026 · 5 min · James M
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SpaceX Buys the Right to Buy Cursor for $60 Billion

TL;DR SpaceX has signed an option to acquire Cursor (made by Anysphere) for $60 billion, or pay $10 billion for the joint work if it walks away Cursor’s valuation has risen 24x in fifteen months - from $2.5 billion in January 2025 to a $60 billion option price in April 2026 The deal sits under SpaceX rather than xAI directly, because SpaceX holds the balance sheet after the SpaceX - xAI merger valued at $1.25 trillion For xAI, buying Cursor is a faster route to developer relevance than out-marketing OpenAI’s Codex or Anthropic’s Claude Code If the acquisition closes, three of the main AI coding interfaces will sit inside three frontier labs - raising questions about model neutrality and pricing pressure on independent tools It’s rare to see an option contract make the front page, but that is what landed on 21 April 2026. SpaceX disclosed that it has signed a deal with Cursor - the AI coding tool made by Anysphere - giving it the right to buy the startup outright for $60 billion later this year, or to walk away with a $10 billion payment for the joint work the two teams are doing in the meantime. ...

April 2, 2026 · 6 min · James M